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1 / 202 19974 / 22851

Triple Dereference

Time of First Successful Submission: 2025-09-11 19:50:35

Intro to Programming Languages

15 / 234 9662 / 33082

Commands

Time of First Successful Submission: 2025-09-07 18:08:29

Command Arguments

Time of First Successful Submission: 2025-09-07 18:09:33

Command History

Time of First Successful Submission: 2025-09-07 18:10:20

The Root Path

Time of First Successful Submission: 2025-09-07 18:16:12

Absolute Paths

Time of First Successful Submission: 2025-09-07 18:17:30

Changing position

Time of First Successful Submission: 2025-09-07 18:19:04

Changing to an Absolute Path

Time of First Successful Submission: 2025-09-07 18:20:10

Relative Paths

Time of First Successful Submission: 2025-09-07 18:22:30

Cat

Time of First Successful Submission: 2025-09-08 04:55:46

Ls

Time of First Successful Submission: 2025-09-08 05:04:57

Ls All

Time of First Successful Submission: 2025-09-08 05:08:35

Find

Time of First Successful Submission: 2025-09-08 08:37:39

Piping Echo

Time of First Successful Submission: 2026-04-05 18:52:57

Piping Stdout

Time of First Successful Submission: 2026-04-05 18:54:20

Piping Stdin

Time of First Successful Submission: 2026-04-06 17:17:48

Start Here

10 / 12 20362 / 44760

Using the Terminal

Time of First Successful Submission: 2026-04-01 17:44:33

Using the VSCode Workspace

Time of First Successful Submission: 2026-04-01 18:08:49

Using the GUI Desktop

Time of First Successful Submission: 2026-04-01 17:56:02

Pasting into the Desktop

Time of First Successful Submission: 2026-04-01 17:59:24

Restarting Challenges

Time of First Successful Submission: 2026-04-01 18:06:03

Challenge Programs

Time of First Successful Submission: 2026-04-01 18:09:45

The Flag File

Time of First Successful Submission: 2026-04-01 18:11:50

Using Privileged Mode

Time of First Successful Submission: 2026-04-01 18:15:13

Persistent Home Directories - One

Time of First Successful Submission: 2026-04-01 18:17:16

Persistent Home Directories - Two

Time of First Successful Submission: 2026-04-01 18:18:02

Linux Luminarium

128 / 128 2895 / 33513

Intro to Commands

Time of First Successful Submission: 2025-09-07 18:08:29

Intro to Arguments

Time of First Successful Submission: 2025-09-07 18:09:33

Command History

Time of First Successful Submission: 2025-09-07 18:10:20

The Root

Time of First Successful Submission: 2025-09-07 18:16:12

Program and absolute paths

Time of First Successful Submission: 2025-09-07 18:17:30

Position thy self

Time of First Successful Submission: 2025-09-07 18:19:04

Position elsewhere

Time of First Successful Submission: 2025-09-07 18:20:10

implicit relative paths, from /

Time of First Successful Submission: 2025-09-07 18:22:30

explicit relative paths, from /

Time of First Successful Submission: 2025-09-07 18:24:49

implicit relative path

Time of First Successful Submission: 2025-09-07 18:25:29

home sweet home

Time of First Successful Submission: 2025-09-07 18:28:56

cat: not the pet, but the command!

Time of First Successful Submission: 2025-09-08 04:55:46

catting absolute paths

Time of First Successful Submission: 2025-09-08 04:56:31

more catting practice

Time of First Successful Submission: 2025-09-08 04:57:28

grepping for a needle in a haystack

Time of First Successful Submission: 2025-09-08 04:59:04

comparing files

Time of First Successful Submission: 2025-09-08 05:01:35

listing files

Time of First Successful Submission: 2025-09-08 05:04:57

touching files

Time of First Successful Submission: 2025-09-08 05:06:11

removing files

Time of First Successful Submission: 2025-09-08 05:06:47

moving files

Time of First Successful Submission: 2025-09-08 05:07:51

copying files

Time of First Successful Submission: 2026-04-04 17:12:24

hidden files

Time of First Successful Submission: 2025-09-08 05:08:35

An Epic Filesystem Quest

Time of First Successful Submission: 2025-09-08 05:30:50

making directories

Time of First Successful Submission: 2025-09-08 05:31:57

finding files

Time of First Successful Submission: 2025-09-08 08:37:39

linking files

Time of First Successful Submission: 2025-09-08 08:59:28

Learning From Documentation

Time of First Successful Submission: 2025-09-08 09:04:33

Learning Complex Usage

Time of First Successful Submission: 2025-09-08 09:12:49

Reading Manuals

Time of First Successful Submission: 2025-09-08 09:17:56

Searching Manuals

Time of First Successful Submission: 2025-09-08 09:20:11

Searching For Manuals

Time of First Successful Submission: 2025-09-08 10:12:00

Helpful Programs

Time of First Successful Submission: 2025-09-08 10:13:40

Help for Builtins

Time of First Successful Submission: 2025-09-08 10:19:09

Matching with *

Time of First Successful Submission: 2025-09-08 16:02:28

Matching with ?

Time of First Successful Submission: 2025-09-08 16:03:30

Matching with []

Time of First Successful Submission: 2025-09-08 16:04:56

Matching paths with []

Time of First Successful Submission: 2025-09-08 16:09:29

Multiple globs

Time of First Successful Submission: 2025-09-08 16:19:02

Mixing globs

Time of First Successful Submission: 2025-09-08 16:44:54

Exclusionary globbing

Time of First Successful Submission: 2025-09-08 16:46:15

Tab completion

Time of First Successful Submission: 2025-09-08 16:59:30

Multiple options for tab completion

Time of First Successful Submission: 2025-09-08 17:02:47

Tab completion on commands

Time of First Successful Submission: 2025-09-08 17:03:41

Redirecting output

Time of First Successful Submission: 2026-04-05 18:52:57

Redirecting more output

Time of First Successful Submission: 2026-04-05 18:54:20

Appending output

Time of First Successful Submission: 2026-04-05 18:57:55

Redirecting errors

Time of First Successful Submission: 2026-04-06 16:56:16

Redirecting input

Time of First Successful Submission: 2026-04-06 17:17:48

Grepping stored results

Time of First Successful Submission: 2026-04-06 17:21:57

Grepping live output

Time of First Successful Submission: 2026-04-06 17:25:56

Grepping errors

Time of First Successful Submission: 2026-04-06 17:32:21

Filtering with grep -v

Time of First Successful Submission: 2026-04-06 17:34:04

Filtering with sed

Time of First Successful Submission: 2026-04-07 18:06:55

Duplicating piped data with tee

Time of First Successful Submission: 2026-04-07 18:36:25

Process substitution for input

Time of First Successful Submission: 2026-04-11 17:46:55

Writing to multiple programs

Time of First Successful Submission: 2026-04-11 17:59:08

Split-piping stderr and stdout

Time of First Successful Submission: 2026-04-11 18:11:28

Named pipes

Time of First Successful Submission: 2026-04-11 18:19:11

Printing Variables

Time of First Successful Submission: 2026-04-12 03:07:51

Setting Variables

Time of First Successful Submission: 2026-04-12 03:09:40

Multi-word Variables

Time of First Successful Submission: 2026-04-12 03:29:39

Exporting Variables

Time of First Successful Submission: 2026-04-12 04:05:27

Printing Exported Variables

Time of First Successful Submission: 2026-04-12 07:12:31

Storing Command Output

Time of First Successful Submission: 2026-04-12 07:13:36

Reading Input

Time of First Successful Submission: 2026-04-12 07:16:12

Reading Files

Time of First Successful Submission: 2026-04-14 17:54:31

Translating characters

Time of First Successful Submission: 2026-04-14 18:06:15

Deleting characters

Time of First Successful Submission: 2026-04-15 17:31:25

Deleting newlines

Time of First Successful Submission: 2026-04-15 17:37:44

Extracting the first lines with head

Time of First Successful Submission: 2026-04-15 17:40:20

Extracting specific sections of text

Time of First Successful Submission: 2026-04-15 17:47:31

Sorting data

Time of First Successful Submission: 2026-04-15 17:51:39

Listing Processes

Time of First Successful Submission: 2026-04-15 18:06:07

Killing Processes

Time of First Successful Submission: 2026-04-15 18:08:39

Interrupting Processes

Time of First Successful Submission: 2026-04-15 18:14:27

Killing Misbehaving Processes

Time of First Successful Submission: 2026-04-16 10:37:25

Suspending Processes

Time of First Successful Submission: 2026-04-16 10:40:18

Resuming Processes

Time of First Successful Submission: 2026-04-16 10:41:09

Backgrounding Processes

Time of First Successful Submission: 2026-04-16 10:43:03

Foregrounding Processes

Time of First Successful Submission: 2026-04-16 10:44:05

Starting Backgrounded Processes

Time of First Successful Submission: 2026-04-16 10:44:40

Process Exit Codes

Time of First Successful Submission: 2026-04-16 11:49:01

Becoming root with su

Time of First Successful Submission: 2026-04-17 05:06:39

Other users with su

Time of First Successful Submission: 2026-04-17 05:07:57

Cracking passwords

Time of First Successful Submission: 2026-04-17 05:11:11

Using sudo

Time of First Successful Submission: 2026-04-17 15:04:36

Changing File Ownership

Time of First Successful Submission: 2026-04-17 15:11:59

Groups and Files

Time of First Successful Submission: 2026-04-18 17:14:03

Fun With Groups Names

Time of First Successful Submission: 2026-04-18 17:19:09

Changing Permissions

Time of First Successful Submission: 2026-04-18 17:28:22

Executable Files

Time of First Successful Submission: 2026-04-18 17:32:09

Permission Tweaking Practice

Time of First Successful Submission: 2026-04-18 17:40:06

Permissions Setting Practice

Time of First Successful Submission: 2026-04-18 17:45:55

The SUID Bit

Time of First Successful Submission: 2026-04-18 17:49:02

Chaining with Semicolons

Time of First Successful Submission: 2026-04-19 02:21:31

Building on Success

Time of First Successful Submission: 2026-04-19 02:23:04

Handling Failure

Time of First Successful Submission: 2026-04-19 02:23:48

Your First Shell Script

Time of First Successful Submission: 2026-04-20 17:14:15

Redirecting Script Output

Time of First Successful Submission: 2026-04-20 17:31:05

Executable Shell Scripts

Time of First Successful Submission: 2026-04-20 17:33:59

Understanding Shebangs

Time of First Successful Submission: 2026-04-21 09:23:52

Scripting with Arguments

Time of First Successful Submission: 2026-04-21 09:27:31

Scripting with Conditionals

Time of First Successful Submission: 2026-04-21 09:34:25

Scripting with Default Cases

Time of First Successful Submission: 2026-04-21 11:59:47

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-04-21 12:03:00

Reading Shell Scripts

Time of First Successful Submission: 2026-04-21 12:05:52

Launching Screen

Time of First Successful Submission: 2026-04-21 12:13:48

Detaching and Attaching

Time of First Successful Submission: 2026-04-21 12:16:23

Finding Sessions

Time of First Successful Submission: 2026-04-21 12:19:35

Switching Windows

Time of First Successful Submission: 2026-04-21 12:22:16

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-04-21 12:23:53

Switching Windows (tmux)

Time of First Successful Submission: 2026-04-21 17:18:55

The PATH Variable

Time of First Successful Submission: 2026-04-21 17:25:15

Setting PATH

Time of First Successful Submission: 2026-04-21 17:29:42

Finding Commands

Time of First Successful Submission: 2026-04-22 18:44:46

Adding Commands

Time of First Successful Submission: 2026-04-23 07:21:46

Hijacking Commands

Time of First Successful Submission: 2026-04-23 10:21:32

Bashrc Backdoor

Time of First Successful Submission: 2026-04-24 15:01:45

Sniffing Input

Time of First Successful Submission: 2026-04-24 16:19:23

Overshared Directories

Time of First Successful Submission: 2026-04-25 15:33:32

Tricky Linking

Time of First Successful Submission: 2026-04-25 16:08:51

Sniffing Process Arguments

Time of First Successful Submission: 2026-04-25 16:12:26

Snooping on Configurations

Time of First Successful Submission: 2026-04-25 16:15:29

The Fork Bomb

Time of First Successful Submission: 2026-04-25 16:54:40

Disk-Space Doomsday

Time of First Successful Submission: 2026-04-25 17:00:59

rm -rf /

Time of First Successful Submission: 2026-04-25 17:02:55

Life after rm -rf /

Time of First Successful Submission: 2026-04-25 17:07:54

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-04-25 17:16:24

Computing 101

70 / 94 1241 / 22127

Your First Register

Time of First Successful Submission: 2025-09-09 00:19:33

Your First Syscall

Time of First Successful Submission: 2025-09-09 00:22:40

Exit Codes

Time of First Successful Submission: 2025-09-09 00:25:31

Building Executables

Time of First Successful Submission: 2025-09-09 00:33:54

Moving Between Registers

Time of First Successful Submission: 2025-09-09 00:43:40

Loading From Memory

Time of First Successful Submission: 2025-09-10 18:30:00

More Loading Practice

Time of First Successful Submission: 2025-09-10 18:33:45

Dereferencing Pointers

Time of First Successful Submission: 2025-09-11 19:00:14

Dereferencing Yourself

Time of First Successful Submission: 2025-09-11 19:03:33

Dereferencing with Offsets

Time of First Successful Submission: 2025-09-11 19:11:10

Stored Addresses

Time of First Successful Submission: 2025-09-11 19:21:00

Double Dereference

Time of First Successful Submission: 2025-09-11 19:48:32

The Stack

Time of First Successful Submission: 2026-03-16 07:35:23

Stack Offsets

Time of First Successful Submission: 2026-03-16 07:37:43

Program Arguments on the Stack

Time of First Successful Submission: 2026-03-16 10:23:45

Popping From the Stack

Time of First Successful Submission: 2026-03-16 10:28:26

Disassembling Programs

Time of First Successful Submission: 2026-03-16 11:48:09

Tracing Syscalls

Time of First Successful Submission: 2025-09-09 00:56:35

Starting GDB

Time of First Successful Submission: 2025-09-09 00:58:16

Quitting GDB

Time of First Successful Submission: 2026-03-16 12:16:34

Starting Programs in GDB

Time of First Successful Submission: 2025-09-09 01:01:50

Disassembling in GDB

Time of First Successful Submission: 2026-04-29 13:29:59

Stepping Through Instructions

Time of First Successful Submission: 2026-04-29 13:35:25

Reading Register Values

Time of First Successful Submission: 2026-04-29 13:36:31

Popping Stack Values

Time of First Successful Submission: 2026-04-29 13:38:01

Examining Memory

Time of First Successful Submission: 2026-04-30 14:51:13

Examining Stack Pointers

Time of First Successful Submission: 2026-04-30 16:03:15

Cooperative Debugging

Time of First Successful Submission: 2026-04-30 16:16:51

Writing Output

Time of First Successful Submission: 2025-09-13 18:25:33

Chaining Syscalls

Time of First Successful Submission: 2025-09-13 18:31:56

Writing Strings

Time of First Successful Submission: 2025-09-13 18:43:33

Reading Data

Time of First Successful Submission: 2025-09-14 04:59:28

set-register

Time of First Successful Submission: 2025-09-14 06:58:54

set-multiple-registers

Time of First Successful Submission: 2025-09-14 07:01:05

add-to-register

Time of First Successful Submission: 2025-09-15 06:40:07

linear-equation-registers

Time of First Successful Submission: 2025-09-15 14:05:22

integer-division

Time of First Successful Submission: 2025-09-15 14:11:09

modulo-operation

Time of First Successful Submission: 2025-09-15 14:14:43

set-upper-byte

Time of First Successful Submission: 2025-09-15 14:18:18

efficient-modulo

Time of First Successful Submission: 2025-09-15 14:34:32

byte-extraction

Time of First Successful Submission: 2025-09-15 15:37:04

bitwise-and

Time of First Successful Submission: 2025-09-15 15:48:47

check-even

Time of First Successful Submission: 2025-09-16 18:17:43

memory-read

Time of First Successful Submission: 2025-09-17 17:06:27

memory-write

Time of First Successful Submission: 2025-09-18 17:06:03

memory-increment

Time of First Successful Submission: 2025-09-19 16:41:08

byte-access

Time of First Successful Submission: 2025-09-23 17:56:05

memory-size-access

Time of First Successful Submission: 2025-09-24 18:03:03

little-endian-write

Time of First Successful Submission: 2025-09-30 18:33:22

memory-sum

Time of First Successful Submission: 2025-10-03 19:01:01

stack-subtraction

Time of First Successful Submission: 2025-10-03 19:45:53

swap-stack-values

Time of First Successful Submission: 2025-10-04 19:06:39

average-stack-values

Time of First Successful Submission: 2025-10-04 20:06:19

absolute-jump

Time of First Successful Submission: 2025-10-04 20:22:53

relative-jump

Time of First Successful Submission: 2025-10-05 18:59:33

jump-trampoline

Time of First Successful Submission: 2025-10-05 19:04:07

conditional-jump

Time of First Successful Submission: 2025-11-27 10:19:28

indirect-jump

Time of First Successful Submission: 2025-10-06 19:03:10

average-loop

Time of First Successful Submission: 2025-11-27 18:07:13

count-non-zero

Time of First Successful Submission: 2025-11-29 10:35:35

string-lower

Time of First Successful Submission: 2025-11-30 17:41:28

most-common-byte

Time of First Successful Submission: 2025-12-16 20:20:31

Debugging Programs

Time of First Successful Submission: 2025-12-19 03:56:18

Inspecting Registers

Time of First Successful Submission: 2025-12-19 14:18:38

Examining Memory

Time of First Successful Submission: 2025-12-19 17:22:16

Setting Breakpoints

Time of First Successful Submission: 2025-12-23 02:48:29

GDB Scripting

Time of First Successful Submission: 2025-12-23 03:33:38

Modifying Data

Time of First Successful Submission: 2025-12-23 03:59:53

Modifying Execution

Time of First Successful Submission: 2025-12-24 06:14:38

Broken Functions

Time of First Successful Submission: 2026-01-04 19:57:31

GCA CTF

10 / 104 20491 / 45041

Using the Terminal

Time of First Successful Submission: 2026-04-01 17:44:33

Using the VSCode Workspace

Time of First Successful Submission: 2026-04-01 18:08:49

Using the GUI Desktop

Time of First Successful Submission: 2026-04-01 17:56:02

Pasting into the Desktop

Time of First Successful Submission: 2026-04-01 17:59:24

Restarting Challenges

Time of First Successful Submission: 2026-04-01 18:06:03

Challenge Programs

Time of First Successful Submission: 2026-04-01 18:09:45

The Flag File

Time of First Successful Submission: 2026-04-01 18:11:50

Using Privileged Mode

Time of First Successful Submission: 2026-04-01 18:15:13

Persistent Home Directories - One

Time of First Successful Submission: 2026-04-01 18:17:16

Persistent Home Directories - Two

Time of First Successful Submission: 2026-04-01 18:18:02